[oracle@oracle ~]$ oerr ora 20463
02046, 00000, "distributed transaction already begun"
// *Cause: internal error or error in external transaction manager.
//         A server session received a begin_tran RPC before finishing
//         with a previous distributed tran.

dbms_session.close_database_link(dblink_name);
exec dbms_utility.EXEC_DDL_STATEMENT@db_link_developer('create table test as select * from dba_objects@dblink_to_A');
--实验参见http://blog.csdn.net/stevendbaguo/article/details/50155845
dbms_session.close_database_link(dblink_name);

Error Id: ORA-06512

Title: at stringline string

Description:

at stringline string

Action:

Fix the problem causing the exception or write an exception handler for this condition. Or you may need to contact your application administrator or DBA.

Cause:

Backtrace message as the stack is unwound by unhandled exceptions.

Error Id: ORA-02063

Title: preceding stringstring from stringstring

Description:

preceding stringstring from stringstring

Action:

refer to the preceding error message(s)

Cause:

an Oracle error was received from a remote database link.

Error Id: ORA-02046

Title: distributed transaction already begun

Description:

distributed transaction already begun

Action:

none

Cause:

internal error or error in external transaction manager. A server session received a begin_tran RPC before finishing with a previous distributed tran.

-- 来自：